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Tesi sul tema "Plasticity"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Sherwood, James Lawrence. "Mossy fibre plasticity." Thesis, University of Bristol, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618313.

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This study used extracellular field potential recordings (fEPSP) to investigate the role of kainate receptors (containing GLUK5) in short- and long-term potentiation (S-/L-TP) in the mossy fibre (MF) pathway. In vitro, the role of GLUK5 in synaptic plasticity is dependent on extracellular calcium concentration. So the physiological importance was investigated in vivo. In a single experiment GLUK5 selective antagonist, LY382884 (10 mg.kg-l, i.v.), attenuated STP. Notwithstanding, there is continued controversy regarding the role of GLUK5 in MF synaptic plasticity. Using GLUK5 selective antagoni

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2

Klempin, Friederike Claudia. "Adult brain plasticity." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2008. http://dx.doi.org/10.18452/15844.

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Der Hippocampus ist eine von zwei Gehirnregionen, in der zeitlebens kontinuierlich neue Nervenzellen gebildet werden. Er spielt eine wichtige Rolle bei der Gedächtniskonsolidierung und wird mit der funktionellen Entstehung neurodegenerativer Erkrankungen in Verbindung gebracht. Strukturveränderungen im erwachsenen Gehirn, die mit einer Depression einhergehen, sind laut Literatur auf einen geringen Serotoninspiegel und reduzierte hippocampale Neurogenese zurückzuführen. Selektive Serotonin-Wiederaufnahmehemmer (SSRI) erhöhen die Serotoninkonzentration im synaptischen Spalt und üben einen positi

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3

Elramah, Sara. "Towards a Better Understanding of miRNA Function in Neuronal Plasticity : implications in Synaptic Homeostasis and Maladaptive Plasticity in Bone Cancer Pain Condition." Thesis, Bordeaux 2, 2013. http://www.theses.fr/2013BOR22073/document.

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Les micro-ARNs (miRNAs) sont de petits ARNs (20-25 nt) qui ont un rôle important dans les mécanismes d'interférence ARN. Les miRNAs sont des inhibiteurs de l'expression génique qui interviennent au niveau post-traductionnel en s'hybridant à des sites spécifiques de leurs ARNm cibles. Ce mécanisme induit la dégradation de l'ARNm ou l'inhibition de sa traduction. Puisque l'hybridation partielle du miRNA est suffisante pour induire une inhibition, chaque miRNA peut avoir des centaines de cibles. Les miRNAs sont impliqués dans de nombreuses fonctions biologiques et en particulier dans processus ne

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4

VanDam, Mark. "Plasticity of phonological categories." [Bloomington, Ind.] : Indiana University, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3277973.

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Thesis (Ph.D.)--Indiana University, Dept. of Linguistics, 2007.<br>Source: Dissertation Abstracts International, Volume: 68-09, Section: A, page: 3830. Adviser: Robert F. Port. Title from dissertation t.p. (viewed May 1, 2008).

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5

Brookes, Jill. "The plasticity of diamond." Thesis, University of Hull, 1992. http://hydra.hull.ac.uk/resources/hull:6745.

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Aspects of the crystal structure of diamond, and its associated defects, have been considered with reference to the effect such characteristics might have on its mechanical properties. Also, established resolved shear stress models, which account for anisotropy in conventional Knoop indentation hardness of all single crystals, have been reviewed. Particular attention has been given to the role of microplasticity and the nature of crack formation in the deformed zone formed beneath the indenter. It is then shown that a similar approach can be applied to the case where a cone, made from a softer

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6

Tsakmaki, Anastasia. "Plasticity of the endoderm." Thesis, University of Bath, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538557.

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7

Castell, Martin R. "Indentation plasticity in semiconductors." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363040.

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8

Kothari, Manish. "Rate independent crystal plasticity." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36611.

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9

Guinnee, Meghan A. "Plasticity in reproductive traits." Thesis, University of Edinburgh, 2005. http://hdl.handle.net/1842/16998.

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In this thesis, I explore how an individual’s environment, or the environment of its mother, affects its reproductive life-history characteristics (age at maturity, size at maturity, offspring size, offspring number). I attempt to explain observed responses using adaptive reasoning and/or mathematical modelling. I find that mean egg size decreases with increasing clutch size in <i>Daphnia, </i>and explore possible causes of this using a mathematical model. This pattern could be an adaptive response, if larger offspring have greater fitness advantages in food-limited environments. However, such

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10

Dekkers, Martijn. "Plasticity in Caenorhabditis elegans." [S.l.] : Rotterdam : [The Author] ; Erasmus University [Host], 2008. http://hdl.handle.net/1765/13961.

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11

Carney, Karen. "Caractérisation Protéomique Des Prolongements Astrocytaires au Cours de la Plasticité Synaptique." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0270/document.

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Les astrocytes sont les cellules les plus abondantes dans le cerveau où ils sontimpliquées dans une myriade de fonctions telles que la neurogénèse, l’homéostasieionique, le soutien métabolique, l’élimination des substances toxiques et dans laréponse aux lésions cérébrales. Des altérations fonctionnelles des astrocytes ont étéassociées avec des pathologies telles que l’épilepsie, la depression et laschizophrénie. A ce titre, l’étude de la contribution astrocytaire aux fonctionssynaptiques revêt un intérêt clinique et sociétal assez conséquent. Dans cette thèse,j’ai évalué le potentiel de plusie

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12

Prokin, Ilia. "Synaptic plasticity emerging from chemical reactions : Modeling spike-timing dependent plasticity of basal ganglia neurons." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI115/document.

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Notre cerveau prend en charge différentes formes d’apprentissage dans ses diverses parties. C’est par exemple le cas des ganglions de la base, un ensemble de noyaux sous-corticaux qui est impliqué dans la sélection de l’action et une forme spécifique de l’apprentissage / mémoire, la mémoire procédurale (mémoire des compétences ou d’expertise). A l’échelle du neurone unique, le support le plus plausible de l’apprentissage et de la mémoire est la plasticité synaptique, le processus par lequel l’efficacité de la communication entre deux neurones change en réponse à un pattern spécifique de condit

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13

Adzima, Francis. "Modélisation et simulation de procédés de mise en forme de tôles métalliques ultrafines." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0066/document.

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La course à la miniaturisation entraine une forte hausse de la demande encomposants aux dimensions submillimétriques et donne un essor considérable aux procédés de micro-formage. Cependant le comportement mécanique des tôles ultrafines, employées dans ces procédés présente des singularités liées à la réduction du nombre de grains. Cette thèse a eu pour objet de mettre en place un outil d’aide à la prédiction du comportement mécanique des tôles ultrafines.Expérimentalement, le comportement de deux alliages de cuivre, le CuBe2 et le CuFe2P, a été caractérisé sous divers types de chargement. Dive

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14

Valtcheva, Silvana. "Conditions for the emergence of corticostriatal synaptic plasticity." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066627/document.

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D'après le postulat de Hebb, les réseaux neuronaux adaptent leur connectivité sous l'influence des activités pré- et post-synaptiques. La " spike-timing-dependent plasticity " (STDP) est une règle d'apprentissage synaptique de type Hebbien, qui repose sur la structure temporelle précise des patrons d'activités appariées de part et d'autre de la synapse. La plasticité cortico-striatale serait le substrat biologique de l'apprentissage procédural effectué par les ganglions de la base. Les neurones de sortie du striatum agissent comme des détecteurs de coïncidence des activités corticales et thala

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15

Ho, Shu Xian. "Silent synapses and postnatal development of the mouse cerebellar cortex." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0604/document.

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Dans le cortex cérébelleux, au premier chef impliqué dans l’apprentissage moteur, chaque neurone de Purkinje reçoit des centaines de milliers d'entrées provenant de cellules granulaires. Etonnement, il a été suggéré qu'une grande majorité de ces connexions (synapses) sont silencieuses, c’est-à-dire qu’elles ne transmettent pas d’information détectable. Les propriétés et le rôle de ces synapses silencieuses restent mystérieux. Jouent-elles le rôle d’une réserve ou sont-elles le produit de l’apprentissage cérébelleux ? En combinant l’enregistrement électrique de la transmission synaptique et la

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16

Zellner, Samantha R. "Charpy Impact Testing of Twinning Induced Plasticity and Transformation Induced Plasticity High Entropy Alloys." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1538702/.

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High entropy alloys (HEAs) are a new class of solid solution alloys that contain multiple principal elements and possess excellent mechanical properties, from corrosion resistance to fatigue and wear resistance. Even more recently, twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) non-equiatomic high entropy alloys have been engineered, promising increased strength and ductility as compared to their equiatomic counterparts. However, impact and fracture resistance of these HEAs has not been studied as much as their other mechanical properties. In this thesis, the h

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17

Blaha, Jakub. "Výpočtová analýza zbytkových napětí u autofretovaných vysokotlakých zásobníků paliva." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231712.

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The master‘s thesis is aimed on numerical simulation of autofrettage of high pressure fuel vessel – rail in Common Rail system. First there is described Chaboche model, which is later used for simulation of autofrettage. There are described different approaches which can be used to obtain sufficient material model. Then there is observed influence of these different approaches on stress state of rail within the process of autofrettage. Suitability of Chaboche model for autofrettage and re-autofrettage simulations is assessed by comparing with more complex Jiang model. In the end there is a stu

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18

Nguyen, Tuan Hung. "Développement d’outils numériques pour la prise en compte du couplage hydrogène-plasticité dans un code éléments finis : application à l’essai de pliage en U." Thesis, Paris 13, 2014. http://www.theses.fr/2014PA132032/document.

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Dans le cadre de l’étude du couplage entre la plasticité et les interactions de l’hydrogène avec les matériaux métalliques, l’objectif de ce travail de thèse est l’implémentation dans le code de calcul par éléments finis Abaqus© de la loi de diffusion de l’hydrogène couplée aux champs mécaniques, tenant compte notamment du piégeage dû à la déformation plastique. La stratégie d’implémentation retenue permet de résoudre simultanément les problèmes de diffusion et de mécanique ; elle s’est appuyée sur les travaux de la littérature, et a nécessité le développement de procédures en fortran 77, et e

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19

Londe, Sylvain. "Origines et potentiel évolutif des intercastes chez la fourmi Mystrium rogeri." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066320/document.

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Les colonies de fourmis produisent occasionnellement des individus intermédiaires entre les reines et les ouvrières (c.-À-D. intercastes). Les intercastes pourraient être impliquées dans l'évolution de nouvelles castes par un processus de réorganisation des phénotypes ancestraux. Afin d'évaluer cette hypothèse, nous avons étudié la validité de trois corollaires de ce modèle évolutif chez la fourmi Mystrium rogeri: (i) les intercastes résultent de la réorganisation de caractères de reines et d'ouvrières; (ii) les intercastes sont susceptibles d'être fonctionnelles parce qu'elles recombinent des

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20

Benamar, Mehdi. "Modulation de la plasticité et des fonctions suppressives des lymphocytes T régulateurs par les molécules de signalisation Themis1 et Vav1." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30249.

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Les lymphocytes T régulateurs Foxp3+ jouent un rôle crucial dans l'établissement de la tolérance au soi, le contrôle des réponses inflammatoires et le maintien de l'homéostasie du système immunitaire. La compréhension des mécanismes moléculaires impliqués dans la fonction de ces cellules représente un défi important. Chez le rat, la déficience en Themis1, une nouvelle molécule de la signalisation du TCR, associée à un locus de 117kb d'origine BN induit un défaut fonctionnel des Tregs et le développement spontané d'une maladie inflammatoire des intestins. Au sein de ce locus, le rat BN présente

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21

Avanzi, Ariel. "Biophysical model of synaptic plasticity." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21967/.

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Nel 1982 Elie Bienestock, Leon Cooper e Paul Munro scrissero ”Theory for the development of neuron selectivity” proponendo uno schema di evoluzione sinaptica nel quale competono i modelli in arrivo piuttosto che la convergenza degli afferenti. Brevemente divenne nota come teoria BCM e fu il trampolino di lancio per ulteriori lavori sulla modificazione delle sinapsi corticali. Durante le ultime due decadi sono state fatte nuove formulazioni, come la IBCM di Nathan Intrator e Leon Cooper del 1992, e nuovi metodi sono stati introdotti permettendo la creazione di reti neurali più complicate ed e

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22

Rick, John Thomas. "Frequency, plasticity and information processing." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ59069.pdf.

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23

Sayre, Eleanor C. "Plasticity: Resource Justification and Development." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/SayreEC2007.pdf.

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24

Linnarsson, Sten. "Neurotrophic factors and neuronal plasticity /." Stockholm, 2001. http://diss.kib.ki.se/2001/91-628-4618-3/.

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25

Adkin, P. "Yield surfaces in cyclic plasticity." Thesis, Coventry University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374221.

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26

Samsel, Paulina Anna. "Retinal plasticity in experimental glaucoma." Thesis, Cardiff University, 2010. http://orca.cf.ac.uk/54163/.

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Our study confirmed the existence of a perineuronal net in the rat retina and indicated that molecular weight distribution and immunohistochemical tissue localisation of glycosaminoglycans varied in young, old and glaucomatous rat retinas.

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27

Billings, Guy. "Memory stability and synaptic plasticity." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/3853.

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Numerous experiments have demonstrated that the activity of neurons can alter the strength of excitatory synapses. This synaptic plasticity is bidirectional and synapses can be strengthened (potentiation) or weakened (depression). Synaptic plasticity offers a mechanism that links the ongoing activity of the brain with persistent physical changes to its structure. For this reason it is widely believed that synaptic plasticity mediates learning and memory. The hypothesis that synapses store memories by modifying their strengths raises an important issue. There should be a balance between the nec

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28

Nelson, Barry Declan. "Genetic factors affecting neural plasticity." Thesis, Queen's University Belfast, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.602694.

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Electrophysiological stimulation has been proffered as having the potential to improve rehabilitation in stroke survivors suffering residual motor deficits. Interindividual variation exists in the response to these interventions, undoubtedly mediated at least in part by genetic factors. The thesis identified 3 candidate genes in neural plasticity, and determined their impact on the efficacy of paired associative stimulation (PAS) and transcranial direct current stimulation tDeS in forearm muscles, which are often the target of rehabilitation therapies . Three candidate genes in neural plastici

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29

Whitehouse, Mary Elizabeth Anora. "Behavioural plasticity in Argyrodes antipodiana." Thesis, University of Canterbury. Zoology, 1991. http://hdl.handle.net/10092/5858.

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In this thesis I look at the behavioural plasticity of A.antipodiana while foraging and interacting with conspecifics. The aim is to see how an animal, with apparently limited intelligence is able to deal with environmental variability. I conclude that A.antipodiana appears to have been able to overcome these limitations very effectively by using four methods, of which the first two effectively reduce the amount of learning necessary. Firstly, A.antipodiana simplifies the situation as much as possible by ignoring some of the variability. For example, in social situations, A.antipodiana appear

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30

Johnson, Richard James Ramsay. "Plasticity in adult automatic neurons." Thesis, University College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299940.

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31

Hwang, Hongik. "Molecular mechanisms of synaptic plasticity." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/105027.

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Thesis: Ph. D. in Biological Chemistry, Massachusetts Institute of Technology, Department of Chemistry, 2016.<br>Cataloged from PDF version of thesis. Vita.<br>Includes bibliographical references.<br>Synaptic plasticity serves as a central molecular mechanism underlying learning and memory formation in the brain. An increase in intracellular calcium concentrations triggered by neuronal activity induces synaptic plasticity, and calmodulin is a key protein that detects the elevated calcium levels and propagates downstream signaling. Neurogranin is a neuron-specific protein that binds to calmodul

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32

Howie, Philip Robert. "Measuring plasticity in brittle materials." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610682.

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33

Woollett, K. "Plasticity in the human hippocampus." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1310481/.

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If we are to approach rehabilitation of memory-impaired patients in a systematic and efficacious way, then it is vital to know if the human memory system has the propensity for plasticity in adulthood, the limiting factors on such plasticity, and the timescales of any plastic change. This thesis was motivated by an attempt to develop a body of knowledge in relation to these questions. There is wide agreement that the hippocampus plays a key role in navigation and memory across species. Evidence from animal studies suggests that spatial memoryrelated hippocampal volume changes and experience-re

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34

Thomas, Adam G. "Brain plasticity and aerobic fitness." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:c941d5b2-4b37-420a-be3f-d71e753fc8d6.

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Regular aerobic exercise has a wide range of positive effects on health and cognition. Exercise has been demonstrated to provide a particularly powerful and replicable method of triggering a wide range of structural changes within both human and animal brains. However, the details and mechanisms of these changes remain poorly understood. This thesis undertakes a comprehensive examination of the relationship between brain plasticity and aerobic exercise. A large, longitudinal experiment was conducted in which healthy but sedentary participants were scanned before and after six-weeks of monitore

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35

Zahedi, S. Abolfazl. "Crystal-plasticity modelling of machining." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/14588.

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A machining process is one of the most common techniques used to remove material in order to create a final product. Most studies on mechanisms of cutting are performed under the assumption that the studied material is isotropic, homogeneous and continuous. One important feature of material- its anisotropyis linked to its crystallographic nature, which is usually ignored in machining studies. A crystallographic orientation of a workpiece material exerts a great influence on the chip-formation mechanism. Thus, there is a need for developing fundamental understanding of material's behaviour and

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Cheng, Yi Pik Helen. "Micromechanical investigation of soil plasticity." Thesis, University of Cambridge, 2004. https://www.repository.cam.ac.uk/handle/1810/272053.

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Walton, James C. "Photoperiod, Brain Plasticity, and Behavior." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1364994837.

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38

Padrão, Ana Isabel Martins Novais. "Mitochondrial plasticity in pathophysiological conditions." Doctoral thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12025.

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Doutoramento em Bioquímica<br>Both skeletal and cardiac muscles daily burn tremendous amounts of ATP to meet the energy requirements for contraction. So, it is not surprising that the maintenance of mitochondrial morphology, number, distribution and functionality in striated muscle are important for muscle homeostasis. In these tissues mitochondria present the added dimension of two populations, the intermyofibrillar (IMF) and the subsarcolemmal (SS) mitochondria, being IMF the most abundant one. In the present thesis, the molecular mechanisms harboured in mitochondria of striated muscles were

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39

Focht, Eric M. "Transformation induced plasticity in ceramics." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-12232009-020415/.

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40

Karakossian, Movses H. "Molecular substrates of cerebellar plasticity." Diss., Restricted to subscribing institutions, 2007. http://proquest.umi.com/pqdweb?did=1428839071&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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41

Mysore, Shreesh Pranesh Schuman Erin Margaret Quartz Steven. "Structural plasticity in neuronal networks /." Diss., Pasadena, Calif. : California Institute of Technology, 2007. http://resolver.caltech.edu/CaltechETD:etd-11102006-021149.

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42

Johnson, Hope Amy. "Plasticity of cortical network dynamics." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1835448081&sid=7&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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43

He, Kaiwen. "AMPA Receptor and synaptic plasticity." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9181.

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Thesis (Ph.D.) -- University of Maryland, College Park, 2009.<br>Thesis research directed by: Dept. of Biology. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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44

Kohengadol, Roni A. "Nonlinear solvers for plasticity problems." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0408104-111231.

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45

Cziko, Anne-Marie. "Translational Control of Synaptic Plasticity." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195589.

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Activity-dependent and synapse-specific translation of mRNAs is required for long-term changes in synaptic strength (or efficacy). However, many of the components mediating repression, transport and activation of mRNAs are unknown. Translational control in neurons is a highly conserved process and mediated by a ribonuclear particle (RNP). This study shows that RNPs in Drosophila neurons are similar not only to mammalian neuronal RNA granules but also to yeast P-bodies, cytoplasmic foci involved in translational repression and RNA decay. The evolutionarily conserved proteins Me31b and Trailer

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46

Scholey, Andrew Belton. "Immunological investigations into synaptic plasticity." Thesis, Open University, 1991. http://oro.open.ac.uk/57339/.

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Antibody technology was applied to the study of synaptic plasticity resulting from passive avoidance training in the chick and long-term potentiation in the rat. These studies fell into three categories: 1) the disruption of memory for a one-trial passive avoidance task by intracranial injection of an anti-postsynaptic density antiserum 2) mapping time- and locus-specific changes in the chick brain using antisera to the cytoskeletal proteins (Xtubulin and microtubule-associated protein 2 following passive avoidance training and 3) using antibodies to synaptically-enriched antigens to map time-

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47

Edwards, Thomas Edward James. "Plasticity of γ-TiAl alloys". Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275867.

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Gamma titanium aluminide alloys are emerging as a lightweight replacement to nickel superalloys, with current application in turbine stages of aero-engines, as well as in high performance automobiles and potentially the nuclear industry. The lack of toughness of its two constitutive intermetallic phases, γ-TiAl and α2-Ti3Al, prevents a conventional damage tolerant approach to fatigue lifing. To gain confidence in the use of γ-TiAl alloys and extend the temperature-stress envelope of applicability, the present work aims to achieve an understanding of the development of plasticity and flaw forma

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48

Fuhrmann, Delia Ute Dorothea. "Learning and plasticity in adolescence." Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/10040234/.

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Adolescence is the period of life between puberty and relative independence. It is a time during which the human brain undergoes protracted changes - particularly in the frontal, parietal and temporal cortices. These changes have been linked to improvements in cognitive performance; and are thought to render adolescence a period of relatively high levels of plasticity, during which the environment has a heightened impact on brain development and behaviour. This thesis investigates learning and plasticity in adolescence in four experimental studies. Study 1 examined age differences in face cogn

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Sallagundala, Nagaraja. "Neuronal hypothalamic plasticity in chicken." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2007. http://dx.doi.org/10.18452/15600.

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Abstract (sommario):

Aufgabe der elektrophysiologischen Studie zur Charakterisierung der neuronalen hypothalamischen Plastizität beim Haushuhn war es, den Einfluss des Alters sowie GABAerger Substanzen auf die Feuerrate und die Temperatursensitivität (thermischer Koeffizient: TC) von Hypothalamusneuronen mittels extrazellulärer Ableitungen in Hirnschnitten zu untersuchen. Im Vergleich zu adulten Vögeln und Säugetieren wurde bei juvenilen Hühnern eine hohe neuronale Kältesensitivität nachgewiesen, die offensichtlich eine spezifische Eigenschaft juveniler Vögel ist. Die Ontogenese der neuronalen hypothalamischen T

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50

Forest, Jérémy. "Impact of adult neurogenesis versus preexisting neurons on olfactory perception in complex or changing olfactory environment." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1326/document.

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L'olfaction est un sens clé dans l'adaptation du comportement. Pour permettre des actions appropriées le système olfactif doit effectuer des discriminations fines entre stimuli. Les performances de discrimination peuvent être améliorées via l'apprentissage perceptif et une structure cérébrale clé : le bulbe olfactif. Cette structure est cible d'une forme de plasticité particulière qui est la neurogenèse adulte. C'est là que des nouveaux neurones, majoritairement des cellules granulaires, régulent l'activité des cellules relais. Il a été montré que ces neurones sont requis pour un apprentissage

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